FWIW, the starting circuit on this truck is pretty simple.
The power side of the starter motor solenoid is a direct run from the positive battery terminal.
THe logic side of the circuit is battery/fusible link/ignition switch/NSS/starter.
If you are hearing the starter solenoid close, then the logic side checks good. Either you have bad starter contacts/plunger in the starter or there is no direct connection to the battery or there is a bad ground from the starter motor to the block.
The power side of the starter motor solenoid is a direct run from the positive battery terminal.
THe logic side of the circuit is battery/fusible link/ignition switch/NSS/starter.
If you are hearing the starter solenoid close, then the logic side checks good. Either you have bad starter contacts/plunger in the starter or there is no direct connection to the battery or there is a bad ground from the starter motor to the block.